Sack and bag seal and fastener



March 29, 1949. J. T. GREENSLADE 2,465,646

SACK AND BAG SEAL AND FASTENER Filed March 26, 1945 /0 INVENTOR.

ATTCI R N EYEi Patented Mar. 29, v1949 UNITED STATES PATENT OFFICE SACKAND BAG SEAL AND FASTENER John Thomas Greenslade, Victoria, BritishColumbia, Canada 1 Claim. 1

My present invention relates to improvements in closures and sealingmeans for bags, sacks and the like.

It is of importance in closing bags or sacks used for sugar, our, grainand the like to completely seal up the opening through which the bag hasbeen lled so that the contents will not be spilled therefrom, and it hasbeen customary in the past to sew up such bags. It is obvious that ifsuch sewing is to be effective, it is a slow painstaking process.

The object in the present invention is therefore to provide a bag, sackor the like having sealing means which effectively prevent the spillingof sugar, our, grain, feed and the like without the necessity of sewingup the opening of the bag. A further object is to provide a bag, sack orthe like having closure means which, while effectively sealing the bag,are quickly and easily engaged and disengaged.

According to the invention there is therefore provided a bag or the likehaving a mouth adapted to be collapsed to bring opposite side Wallsthereof together, these side walls being of substantially equal length,and a flap member rectangular in shape is secured along one edge to theinside of one of the side walls of the mouth along a line substantiallyparallel to the outer limit of the mouth. This line along which the flapis secured is removed from the outer limit of the mouth so that there isformed between the flap and the outer portion of the side wall to whichit is connected what may be called a pocket which will receive the outerportion of the other side wall when it is folded over. This so-calledpocket is in fact open at the sides. Means are preferably then providedon the flap member adapted to pass through the side wall to which it isnot connected and thereafter to be passed through the side wall to whichit is connected and thereafter to be engaged by retaining means on theside wall to which it is connected. In a preferred form, these meanspass also through the side to which the flap is attached beforeengagement by the retaining means.

According to a modification of the invention, the flap member extendingfrom side to side of the bag mouth is replaced by a plurality ofrelatively narrow tabs secured at one end to one side wall and havingsecured to the other end means for engaging retaining means on said sidewall after having passed through the opposite side wall.

The invention will now be described by reference to the accompanyingdrawings, in which Figure 1 is a perspective view of the mouth of a bagembodying the preferred form of the invention;

Figure 2 is a vertical section through the bag .mouth shown in Figure 1;

Figure 3 is a detail in section of the mouth of the bag in sealedcondition showing one form of closure means;

Figure 4 is similar to Figure 3 showing a modied form of closure means;

Figure 5 is a vertical section through the bag mouth according to amodied form of the invention;

Figure 6 is a fragmentary view of the inside `surface of the bag shownat the left hand side board II or similar material. As shown in Fig" ure2, the mouth of the bag may be folded over the cardboard or the like.The result is to form what may be called a rim portion of the mouth ofthe bag which is of increased body.

Substantially at the bottom of this rim on one rof the side walls andwhich is marked Illa, there is attached an elongated rectangular flapI2. This flap I2 is secured to the side wall Illa only along its loweredge and extends outwardly towards the outer limit of the mouth of thebag forming between the flap I2 and the outer portion of the wall I'Zawhat may be termed for the sake of convenience an open ended pocket I3adapted to receive the outer portion of the side wall I 0b when it isfolded over on top of the flan I2.

Holes I4 and I5 are formed in the side Walls II'Ib and Illa respectivelyand the flap I2 is provided with closure members I6 adapted to passthrough the holes I4 and I5 (in that order) when the outer part of theside wall IIIb is first folded over the flap I2 and then the outer partof the side wall Illa is folded over the outer part of the side wall Ib.In the modification shown in Figure 4, the member I 6' has formed at itsend a tubular portion I1 and on the outside of the outer portion of theside wall Ia there is attached a tab I8' adapted to engage this tubularportion and hold the two side wall portions and the flap in engagementas shown in Figure 4.

firm engagement of the side wall IIlb between the flap I2 and the sidewall Illa. Any contents which might escape would have to pass aroundthe' end of the flap I2, along the width of'. thel flap I2^ between itand the side wall Ib, aroundv theend of the side wall IIIb held inengagement with the side wall Ia, and along the contacting surfaces ofthe side walls Illa, and I0b.

In Figures and 6 there is shown a modification in which the flap I2 isreplaced by a plurality of tabs" 2`I secured at one end to the side walllila and having at its other end a closure member with retaining meanswhich may resemble the tubular partll shown in Figures 1 to 3. Thesetabs are passed through holes 2'2 formed in the side wall I0b, and thesidewall IIlb is folded over so that its edge 23 will be in contact withor very close to the inside surface of the side wall Illa between thepoint atv which the tab is secured to the side Wall IIJa and the hole24. The tabsV 2lv are then passed through the hole 24 from the insideofi the bag; the side wall IIla isy folded downr on. top of the outersurface of the side wallV Ib and.' the side wall Illa is held inposition folded against side walls I'Ilb by retaining means which may bethe tab IB described with reference to Figures 1 to 3.

As will be understood, it is not necessary that the portion of the mouthwhich has been describedas the rim should be reinforced as shown inFigure 2. Such reinforcing may be entirely dispensed with ormay beprovided in only one sid'e wall, as is shown in Figure 5, the cardboardor other reinforcing material 25 being provided* only in the sid'e wallIIIb.

In the' modified form shown in Figure '7, the sack' or' bag I0 isreinforced at the mouth on both` sides of the opening at 2li` and 26a. Areasonable number of openings 28 and 29 are made in the side walls, forinstance, four or more. The open'- ings in one side wall are locatedhigher than those in the remaining side Wall, and the flap member 21runs the width of the sack and is attached to said first side wall. Thehooks 30 rst enter the hole 24. Parts Illa and 26 are then folded overflap 21, and parts Illb and 26a are then folded over parts IIIa and 26,and the metal hooksenter the hole 29 tof seal the sack.

From the foregoing, it'isibelieved that the operation and advantages ofmy invention will be apparent, but it is pointed out that changes inform size, shape, materials, construction and arrangement of parts is:permissible and within my broad inventive concept.A Interpretation ofthe scope of! myifnvention should only be conclusive when made in thelight of the subjoined claim.

I claim A7 bag having upper end portions adapted in closing the bag tobe folded one upon the other into a position substantially normal to thesides of the bag, said end portions' being providedwith a plurality ofopenings adapted to register' when. said end portions are in foldedposition, a iiap within the mouth portion of' the `bag secured below thefoldabl'e endportions along one longitudinal edge. only to a side of thebag,r said flap being, adaptedf to underlie said end; portions whensaidl end portions areY folded, a corresponding plurality of.elernentsJeach` having, an angularly formed rod like portion and' atubular end portion supported. by the flap for passage through said.:openings when said. end portions. are. folded,x and-.means carried byone oi saldi end portions for engagement with Ysaid. elements to retainthe bag.

closed. v Y v JOHN THOMAS. GREENSLADE.

REFERENCES CITED The following references'r are of. record. in the fileof. this patent:

UNITED s'rn'rrreE PATENTS

